#1F836C

CSS

:root {
  --shadows-of-time: #1f836c;
  --shadows-of-time-rgb: 31 131 108;
  --shadows-of-time-oklch: oklch(0.548 0.096 173.3);
}

.element {
  color: var(--shadows-of-time);
  background-color: hsl(166 62% 32%);
  border-color: oklch(0.548 0.096 173.3);
}

Tailwind CSS v4

@theme {
  --color-shadows-of-time: #1f836c;
  --color-shadows-of-time-50: #dafff4;
  --color-shadows-of-time-100: #c8f3e6;
  --color-shadows-of-time-200: #a9e2d2;
  --color-shadows-of-time-300: #81c8b5;
  --color-shadows-of-time-400: #5cb199;
  --color-shadows-of-time-500: #2c9b80;
  --color-shadows-of-time-600: #28836d;
  --color-shadows-of-time-700: #206957;
  --color-shadows-of-time-800: #174d3e;
  --color-shadows-of-time-900: #0f362b;
  --color-shadows-of-time-950: #022118;
}

SCSS

$shadows-of-time: #1f836c;
$shadows-of-time-rgb: 31, 131, 108;
$shadows-of-time-light: mix(#fff, $shadows-of-time, 20%);
$shadows-of-time-dark: mix(#000, $shadows-of-time, 20%);

.element {
  color: $shadows-of-time;
  box-shadow: 0 0 0 2px rgba($shadows-of-time, 0.35);
}